Multi-taxa trait and functional responses to physical disturbance

Area of Science:

• Ecology
• Evolutionary Biology
• Environmental Science

Background:

• Understanding how ecological communities respond to environmental stressors is crucial for predicting biodiversity changes.
• Examining assemblage trait responses offers insights beyond taxonomic diversity, with potential for broader ecological applications.
• Generalizing trait responses across different taxonomic groups remains a challenge.

Purpose of the Study:

• To compare trait responses to physical disturbance among carabids, spiders, and plants.
• To determine if dispersal ability is a consistent trait favored across taxa in recolonizing disturbed habitats.
• To investigate the influence of disturbance intensity on specific biological traits within each taxonomic group.

Main Methods:

• Experimental manipulation of a physical disturbance gradient in open habitats within a forested landscape.
• Sampling of 197 arthropod species (14,738 individuals) and 164 plant species.
• Quantification of trait-disturbance associations using matrix correlations and null model comparisons.

Main Results:

• Carabid and plant assemblages showed trait shifts favoring dispersal: smaller body size, wingedness in carabids, and wind-dispersed seeds in plants.
• Spider recolonization did not favor aerial dispersal; instead, larger body size and cursorial traits, linked to active hunting, were associated with disturbance.
• Trait-function linkages and body size responses varied significantly between carabids and spiders, indicating taxa-specific adaptations.

Conclusions:

• While dispersal ability is a key factor, its expression through specific traits differs among taxa (e.g., carabids vs. spiders).
• Trait-based generalizations across taxonomic groups require careful consideration of functional and ecological context.
• Taxa-specific trait selection is essential for accurate assessment of community responses to environmental disturbance.